YES

Problem:
 app(app(app(uncurry(),f),x),y) -> app(app(f,x),y)

Proof:
 DP Processor:
  DPs:
   app#(app(app(uncurry(),f),x),y) -> app#(f,x)
   app#(app(app(uncurry(),f),x),y) -> app#(app(f,x),y)
  TRS:
   app(app(app(uncurry(),f),x),y) -> app(app(f,x),y)
  KBO Processor:
   argument filtering:
    pi(uncurry) = []
    pi(app) = [0,1]
    pi(app#) = 0
   usable rules:
    app(app(app(uncurry(),f),x),y) -> app(app(f,x),y)
   weight function:
    w0 = 1
    w(app#) = w(uncurry) = 1
    w(app) = 0
   precedence:
    app# ~ app ~ uncurry
   problem:
    DPs:
     
    TRS:
     app(app(app(uncurry(),f),x),y) -> app(app(f,x),y)
   Qed